采用镀膜/循环伏安法原位制备了纳米CuS/GC电极,研究了其制备机理,探讨了具有最大电催化活性的制备及测试条件.通过SEM、EIS对修饰膜进行了表征,表明纳米CuS粒子均匀附着于电极表面,具有较高的导电性.采用电流-时间曲线法研究了CuS/GC电极的分析性能,结果表明,电极对H2O2浓度的响应时间短于0.1s,在0.67～20.5μmol·L-1及0.033～2.93mmol·L-1范围内,电流变化和H2O2浓度的线性方程分别为△i(μA)=-0.0081+0.0267c (R=0.9998)及△i(μA)=0.7378+22.17c (R=0.9930),检出限为6.0×10-8 mol·L-1(S/N=3).该修饰电极具有较高的电化学及贮存稳定性,实际水样测试结果表明回收率为92％～98％,相对标准偏差小于3.6％.
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